Class HnCache

server/database/cache.ts:12–112

// The cache is a singleton

export class HnCache {
  isReady = false;

  /* Feeds - Arrays of post ids in descending rank order */
  [FeedType.TOP]: number[] = sampleData.top;

  [FeedType.NEW]: number[] = sampleData.new;

  [FeedType.BEST]: number[] = [];

  [FeedType.SHOW]: number[] = [];

  [FeedType.ASK]: number[] = [];

  [FeedType.JOB]: number[] = [];

  /* Pre constructed cache of news feeds with news item objects */
  topNewsItems: NewsItemModel[] = sampleData.topStoriesCache;

  newNewsItems: NewsItemModel[] = sampleData.topStoriesCache;

  bestNewsItems: NewsItemModel[] = sampleData.topStoriesCache;

  showNewsItems: NewsItemModel[] = sampleData.topStoriesCache;

  askNewsItems: NewsItemModel[] = sampleData.topStoriesCache;

  jobNewsItems: NewsItemModel[] = sampleData.topStoriesCache;

  /*                  BEGIN NEWS ITEMS                      */

  getNewsItem(id: number): NewsItemModel | undefined {
    return this.newsItemsCache.get(id.toString());
  }

  setNewsItem(id: number, newsItem: NewsItemModel): boolean {
    return this.newsItemsCache.set(id.toString(), newsItem);
  }

  /*                  END NEWS ITEMS                      */

  /*                   BEGIN USERS                        */

  getUser(id: string): UserModel | undefined {
    return this.userCache.get(id);
  }

  getUsers(): Array<LRU.Entry<string, UserModel>> {
    return this.userCache.dump();
  }

  setUser(id: string, user: UserModel): UserModel {
    logger('Cache set user:', user);

    this.userCache.set(id, user);

    return user;
  }